Hydrogen evolution catalyzed by a cobalt complex containing an asymmetric Schiff-base ligand

A cobalt(III) complex containing an asymmetric Schiff-base ligand has been found to be active for proton reduction. Catalysis occurs at −1.2 V vs. Fc+/Fc (0.56 V vs. NHE), resulting in an overpotential of 350 mV. Additionally, the complex is active with a turnover frequency of 420 s−1. An enhancement in activity is observed upon addition of water.